Automatic welt turning mechanism for straight bar knitting machines



Nov. 18, 1958 v A. J. COBERT 2,8

AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES File d June 21, 1952 v I 19 Sheets-Sheet '1 f I q IHH lllH ll "llllllllllilllllll [mmlIllIlll ARTHUR J. COBERT iwfp hfic Nov. 18, 1958 A. J. COBERT 2,860,501 AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT Filed June 21. 1952 BAR KNITTING MACHINES l9 Sheets-Sheet 2' FMN ARTHUR J. COBERT Nov. 13, 1958 2,860,501

J. COBERT AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT Filed June 21. 1952 BAR KNITTING MACHINES l9 Sheets-Sheet 5 FIG 3 ARTH UR J. COBERT Nov. 18, 1958 A. J. COBERT 2,860,501

AUTOMATIC WELT TURNING MECHANISM FORSTRAIGHT BAR KNITTING MACHINES Filed June 21. 1952 19 Sheets-Sheet 4 ARTHUR J. COBERT Nov. '18, 1958 2,860,501 IGHT A. J. COBERT AUTOMATIC WELT TURNING MECHANISM FOR STRA V BAR KNITTING MACHINES Filed June 21. 1952 v 19 Sheets-Sheet 5 1512 27210 JI flobea i, 5 7%M N 1958 A. J. COBERT 2,860,501

AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES Filed June 21, 1952 19 Sheets-Sheet a FIG. 5

ARTHUR J. COBERT ziwwmk Nov. is, 1958 Filed June 21. 1952 A. 7 AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHI J. boar-1m 2 860,501

BAR KNITTING MACHINES -19 Sheets-Sheet 7 I "I I" IFIG 6 ARTHUR J. COBERT s a, agam A. J. COBERT TURNI Nov. 18, 1-958 AUTOMATIC WELT NG MECHANISM FOR STRAIG BAR KNITTING MACHINES Filed June 21. .1952

19 Sheets-Sheet 8 bow wow 5 T WR E. B m0 ad .C. I R U H T R A Nov. 18, 1958 J. COBERT AUTOMATIC WELT TURNINGMECHANISM FOR STRAIGHT Filed June '21. 1952 BAR KNITTING MACHINES 19 Sheets-Sheet 9 tL O'Y J; 10 III .I

INVENTOR. ARTHUR- J. COBERT ATT ORN E Y Nov. 18, 1958 A. J. COBERT 2,850,501

AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES 19 Sheets-Sheet 10 Filed June 21. 1952 INVENTOR. ARTHUR J. COBERT ATTORNI'I Nov. 18, 1958 A. J. COBERT 2,860,501

AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES Filed June 21. 1952 19 Sheets-Sheet 11 o ll l nlu INVENTOR. ARTHUR J. COBERT BY @6 4am ATTORNEY Nov. 18, 1958 A. J. COBERT 2,860,501

AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES Filed June 21. 1952 19 Sheets-Sheet 12 G F i 8 l I 8 Q m 8 m M12; IO 0 Q o 0 0 l\ I El U: o 2 h T q 2 3 O [N In D m (0 Q N 0 m m a a; m k N $2 s (9 q 1 5 INVENTOR. gi ARTHUR J. COBERT AT!" ORN EY Nov. 18, 1958 BERT A. J. CO AUTOMATIC WELT .TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES Filed June 21. 1952 FIG- 2| ARTHUR J. COBERT 19 Sheets-Sheet l3 awe/rum NOV. 18, A COBERT'. AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES Filed June 21. 1952.

19 Sheets-Sheet 14 INVENTOR. ARTHUR J. COBERT AIIORNEY Nov. 18, 1958 OBERT 2,860,501

A. J.C AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT Filed June 21. 1952 BAR KNITTING MACHINES l9 Sheets-Sheet 15 INVENTOR. ARTHUR J. COBERT ATT ORNEY '18, 1 5 COBERT 2,860,501

A. J. AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT Filed June 21. 1952 BAR KNITTING MACHINES l9 Sheets-Sheet 16 INVENTOR. ARTHUR J. COBERT ATTORNEY Nov. 18, 1958 A. J. COBERT 2,850,501

AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES l9 Sheets-Sheet 17 Filed June 21, 1952 INVENTOR. AgT HUR J. COBE RT ATTORNEY Nov. 18, 1958 A. J. COBERT 2,860,501

AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES Filed June 21, 1952 19 Sheets-Sheet l8 INVENTOR. ARTH UR J. COB E RT ATTORNEY Nov. 18, 1958 A. J. COBERT I 2,360,501 AUTOMATIC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES 1 Filed June 21, 1952 19 Sheets-Sheet 19 INVENTOR.

ARTHUR J. COBERT BY g xm ATTORNEY United States AUTOlMATlC WELT TURNING MECHANISM FOR STRAIGHT BAR KNITTING MACHINES This invention relates to straight bar knitting machines, and more particularly to automatic welt turning mechanism for straight bar knitting machines.

Prior art welt turners require manual operation at the beginning of each knitting cycle with consequent loss of time and the necessity of manual labor. It is, therefore, an object of my invention to provide welt turning mechanism which is completely automatic and in which there is no loss of time when changing from one cycle to the next.

Another object of my invention is to provide a straight bar knitting machine having automatic welt turning mechanism to produce stockings which are essentially the same as if made by hand-turned apparatus, and which i have the same fine appearance with no larger openings or bulkiness at the junction of transfer.

Another object of my invention is to provide a straight bar knitting machine having automatic welt turning mechanism which is electrically controlled and is extremely safe in operation, being provided with safety switches to assure synchronization at the moment of transfer.

Another object of my invention is to provide an automatic straight bar knitting machine which is positive and efiicient in its operation, and which is simple to adjust and maintain.

Other and further objects and advantages of my invention will become apparent from the following description taken in conjunction with the accompanying drawings in which like characters of reference designate the same parts throughout the several views, and wherein:

Fig. 1 is a partial front elevation showing the lower section of a knitting machine embodying my invention.

Fig. 2 is a partial elevation showing the middle section of a knitting machine embodying my invention.

Fig. 3 is a partial elevation showing the upper section of a knitting machine embodying my invention.

Fig. 4 is a cross-sectional view taken along the line 4-4 in Fig. 1.

Figure 4a is a detail view on a somewhat enlarged scale of the knock-over bit bar supporting and actuating mechanism, the parts being substantially in the position shown in Fig. 4.

Figure 4b is a detail view on a somewhat enlarged scale of the transfer bar and its supporting and actuating mechanism, the parts being substantially in the position shown in Fig. 4.

Fig. 5 is a cross-sectional view taken along the line 55 in Fig. 2.

Fig. 6 is a cross-sectional view taken along the line 6-6 in Fig. 3.

Fig. 7 is an end view of a detail of the welt bar assembly.

Fig. 8 is an end view of the upper portion shown in Fig. 3.

Fig. 9 is a side view of a detail showing the welt bar in the hook-up or starting position.

, atent O mechanism.

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Fig. 10 is a side view of a detail showing the welt bar locked in the position for transferring the first row of loops.

Fig. 11 is a side view ofa portion of the welt bar assembly.

Fig. 12 is a side .view looking from the right hand end of the machine of a detail showing the locking mechanism for the welt bar assembly.

Fig. 13 is a front view of a detail showing the latch for the welt bar locking mechanism.

Fig. 14 is a rear view of a detail showing mechanism for tilting the welt bar.

Fig. 15 is a side view of a detail showing mechanism for controlling vertical movement of the narrowing frame. Fig. 16 is a side view of a detail showing mechanism for shifting cam followers to the welt turning cams.

Fig. 17 is a top view of a portion of the mechanism shown in Fig. 16. Fig. 18 is a rearview of a detail showing mechanism for moving the take-up rollers in and out.

Fig. 19 is a side view of a detail showing mechanism for rotating the take-up rollers.

Fig. 20 is a schematic view of the main control mecha- IllSlTl.

,Fig. 21 is a front elevation of the electrical control Fig. 22 is a side view of a detail of the control carriage. Fig. 23 is a diagrammatic view of the needle bar motion.

Fig. 24 is a diagrammatic view of the knocking over bar motion.

Fig. 25 is a diagrammatic view of the narrowing frame motion.

Fig. 26 is a diagrammatic view of the welt transfer motion.

Figs. 27 through 41 are pictorial views showing successive steps in the Welt-turning cycle.

CONSTRUCTION Referring now in detail to the embodiment chosen for purpose of illustration, needles 101 are arranged in the customary manner in needle bar 102, and between the needles there are arranged in the customary manner the usual sinkers 103 and dividers 104 which are mounted in the sinker head 105 (see Figs. 4 and 27-41, inclusive). For the purpose of this invention the customary knocking over bits 106 have been arranged on the front side of the needle bar, rather than on the back side as in the standard knitting machine, and are here mounted in the knocking over bar 107.

In the space that is usually occupied by the knocking over bar in the conventional knitting machine, I have placed a new bar which I term a transfer bar 108 in which is mounted a series of slightly curved transfer points 109. The welt bar 110 carrying welt hook 111 is suspended from the upper part of the machine and placed in a position somewhat above the narrowing frame 112 in such manner as not to be an obstruction to the free operation of the machine. The inoperative position of the Welt bar just described is best shown in Fig. 5. The welt bar 110 is pivotally mounted on shaft 113 (see Figs. 2, 7 and 9-13, inclusive), for the purpose of placing the bar in either horizontal or vertical position as needed in the The shaft 113 is pivotally mounted in the hinge 115 and is held therein by means of collar 117 which is fixed to 

